i used that chance when the teacher wasnt looking to go outside and smoke a cigarette (or just ditch all together)... when i came back they were still trying to get it working and they didnt even noticed i was gone that whole time

One of my teachers brought in one of these, set it up and everything. Turned to the class and said, "are y'all ready to watch a movie? Too bad, this is for another class". Teacher's face when he said that.